@misc{indiciae42eb08b298cc,
  title = {Economical solar-heating for homes},
  author = {Allred, J. W. and Shinn, J. M., Jr. and Kirby, C. E. and Barringer, S. R.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19760000571},
  note = {Source identifier: 19760000571}
}